Frankly, I've thought the inbuilt DVD/CD burning features of Windows XP and
Vista have always been pretty flaky. The whole thing just doesn't look to me
as though it was designed by someone who actually wanted it to work, what
with the various balloon messages about seeing files that are ready to be
burned and the series of little dialog boxes. But the past couple of days the
feature doesn't even work badly any more. I stick a blank DVD-R disc in the
drive, the dialog pops up to ask me whether I want to use WMP or Windows to
burn files to the disc. I choose to use Windows, I get to designate the files
I want burned, and the disc image creation progress bar comes up. But that
process, after going on for several minutes, just wanders off into la-la land
and quits. The Explorer Window and the dialog box just go away. No error
messages, no nothing.

Has anyone else seen this on Vista Business RTM?

The only disc burning related installation I have done on this computer is
to install IsoRecorder, which works just fine, BTW.